Hi Gabriele Eigel,
If you want to know when the mouse has left the dropable area, you should use RadDragAndDropManager.DragInfoEvent. For example:
sender, DragDropEventArgs e)
TreeViewDragCue cue = e.Options.DragCue
(e.Options.Status == DragStatus.DropImpossible)
cue.DragActionContent = String.Format(
You can as well check the e.Options.Destination object. Is it null, or is it some specific object?
When you are dragging with drag and drop manager, the mouse events are not fired, that is why you cannot use them.
I hope that this information will help you to implement your logic.
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